JPH07260366A - Detector for falling-off of grate bar in sintering machine and equipment therefor - Google Patents

Abstract

PURPOSE:To keep the operation from disturbance, etc., by a method wherein when a grate bar provided on a pallet of a sintering machine falls off, the falling-off is detected through displacement of a striker and according to the result of the detection the operation is controlled until the spot of the falling-off reaches a place for replacing the grate bar. CONSTITUTION:A pallet 23 of a sintering machine has many grate bars for loading of material for sintering and sucking in of air for combustion. When a grate bar falls off, a contact ring 4 of a falling-off detector falls in at the spot of the falling-off and a striker 1 turns in the direction opposite to that of the traveling pallet 23 under springy force of a spring 6. As a result, the end 1a of the striker 1, positioned opposite to the contact ring 4, touches a limit switch 5 so that a signal denoting the falling-off is transmitted. On the basis of the falling-off signal a calculator 7 calculates the time required before the spot of the falling-off reaches a place for replacing the grate bar. Then a stop command is transmitted from a pallet-movement controller 8 to a pallet- driving gear 9 according to the calculation signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a great bar dropout detector and a dropout detector for a sintering machine pallet for producing a sintered ore for iron making.

[0002]

2. Description of the Related Art A pallet of an endless mobile sinter machine for producing sinter for iron making is loaded with a sintering raw material and a great bar for sucking combustion air below the pallet through a sintering bed. Many (200 to 500 per pallet)
It is used).

This great bar 21 is a front view of FIG. 2 (a) and a sectional view taken along the line AA of FIG. 2 (a).
, The pallet frame 2 is supported by the adjacent pallet frames 22, and even if the pallet 23 is reversed.
It has a structure that does not separate from 2. When the width of the pallet 23 reaches 5 m, 100 or more great bars 21 are arranged in the width direction of the pallet 23. The shape of the great bar 21 is
Although it is shaped so as to form a slight gap between the great bars 21 adjacent to each other, the sintering raw material 24 loaded on the great bar 21 does not pass through this gap and drop downward. Only the combustion air is exhausted through this gap. In FIG. 2, reference numeral 25 is a side frame of the pallet, and 26 is an insulation piece for heat insulation.

The above-mentioned great bar 21 is abraded by the impact when the ore for sintering is dropped onto the pallet 23 and is supplied to the ore, and the abraded part of the pallet 23 is abraded by the impact at the time of reversal, and is sintered. The pallet frame 22 is often damaged due to deterioration and damage due to sudden temperature changes during operation.
Fall out of.

When the great bar 21 falls off, as shown in FIG. 3, the sintering raw material in that portion is blown into the air box 27 below.
It will fall into the hole and will have a hole in it
As a result, the unburned raw material 24a in which suction air does not flow remains as it is in the peripheral portion of the great bar 21 drop, and the sintering yield is significantly deteriorated, and when the dropped great bar 21 is discharged together with the sintered ore. However, it has a great adverse effect on the sintering operation such as being caught in a chute outlet in the subsequent conveying line, causing clogging, and damaging the belt.

Therefore, it is necessary to detect the fall of the great bar 21 as soon as possible and replenish the new great bar 21. As a conventional technique for detecting the fall of the great bar 21, there is a technique disclosed in Japanese Patent Publication No. 51-23245. The detection method based on this technology is to continuously measure the suction air volume with an air flow meter installed in one of the window boxes of the sintering machine, calculate the average air volume, and measure this average air volume and the suction air volume at each time point. The difference from the value is detected, and when the difference exceeds a certain allowable value, it is detected that the great bar 21 has fallen off.

There is also a technique disclosed in Japanese Patent Laid-Open No. 4-268031. The detection method based on this technology, the surface of the sintered bed irradiated with slit light by the floodlight is photographed by a TV camera, the image signal is sent to a calculator to obtain the perforated length of the surface of the sintered bed, When the perforation length exceeds the set value, a signal is sent from the arithmetic unit to the alarm device to issue an alarm.

[0008]

However, the above-mentioned conventional great bar dropout detection method has the following problems. (1) Technology disclosed in Japanese Examined Patent Publication No. 51-23245 Since the average air volume is large, a difference from the average air volume does not occur unless a considerably large perforation occurs, and detection is difficult. Also,
When the window box is perforated, it is difficult to distinguish it from the dropping of the great bar.

(2) In a factory where much dust is generated, such as a sintering factory, even if it works well immediately after installation, dust adheres to the light source with time and weakens the irradiation light, resulting in detection failure. . Further, it takes a considerable amount of time and labor to maintain the equipment, such as changing the irradiation position of the slit light due to the change of the layer thickness of the sintering bed.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and detects the falling of the great bar with high accuracy and makes it easy to maintain the equipment. It is an object of the present invention to provide a dropout detector and a dropout detection device.

[0011]

The falling bar detector of the great bar of the sintering machine according to the present invention takes the first position when it comes into contact with the great bar of the pallet and takes the second position when the great bar is missing. The striker and a detector for detecting whether the striker is in the first position or the second position are combined to form a set, and the set is installed in the width direction of a plurality of pallets. It is a thing.

Further, a great bar dropout detecting device of a sintering machine according to the present invention comprises:
Receive the Great Bar drop signal from this Great Bar drop detector and calculate the time required for the Great Bar drop section to reach the specified Great Bar drop location based on the traveling speed of the pallet Calculate the time required to reach the Great Bar drop section And a pallet traveling control means for stopping the traveling of the pallet when the great bar dropout portion reaches a predetermined great bar replenishment place based on the calculation result of the great bar dropout portion arrival time calculation means.

[0013]

The falling bar detector of the great bar of the sintering machine according to the present invention is provided in the ore feeding section for feeding the sintered ore raw material to the pallet, and the striker comes into contact with the surface of the great bar to make the first position. Take At the dropout portion of the Great Bar, the striker does not contact the surface of the Great Bar, and therefore takes the second position. Since the detector can detect whether the striker is in the first position or the second position, the output of the detector can be monitored to detect whether the great bar has fallen off. By combining such a striker and a detector to form one set and providing a plurality of sets in the width direction of the pallet, it is possible to detect the fall of the great bar over the entire width of the pallet.

In the great bar dropout detecting device of the sintering machine according to the present invention, the time required for the great bar dropout portion to reach the predetermined greatbar replenishing place is accurately grasped based on the above-mentioned great bar dropout signal. Therefore, the grate bar can be replenished efficiently, the sintering yield is improved, and troubles such as line stop are reduced.

The means for calculating the arrival time of the great bar dropout portion calculates the time required for the great bar dropout portion to reach a predetermined great bar replenishing place based on the traveling speed signal of the pallet. Those skilled in the art include, as a valuation, an equivalent item that performs tracking based on a pulse or the like transmitted in accordance with traveling of a pallet and detects that the great bar dropout portion has reached a predetermined great bar replenishing place. Is a clear fact.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A fall detector for a great bar of a sintering machine and a fall detector using this fall detector according to an embodiment of the present invention will be described with reference to FIGS. 1 (a) and 1 (b). Figure 1 (a)
Is a front view showing the installation state of the dropout detector, and FIG. 1B is an explanatory diagram showing the configuration of the dropout detection device using the dropout detector.

In this dropout detector, the striker 1 is rotatably supported by a rotary support shaft 3 supported by a support base 2. The contact wheel 4 rotatably supported at the tip of the striker 1 contacts the surface of the great bar 21 of the pallet 23 that has been discharged and is facing downward, and rotates in the traveling direction of the pallet 23. It is like this. A limit is provided in the vicinity of the end portion 1a extending from the rotation support shaft 3 of the striker 1 in the direction opposite to the contact wheel 4 so that the end portion 1a can contact when the pallet 23 rotates in the opposite direction. A switch 5 is provided.

In the present embodiment, nine strikers 1 are provided in the width direction of the pallet 23, but the number of strikers 1 to be installed can be appropriately selected according to the width of the pallet 23 and the expected detection accuracy. Good.

In the striker 1, if the great bar 21 has not fallen off, the contact wheels 4 are dragged by the great bar 21 and tilted in the traveling direction of the pallet 23 rather than vertically upward, as shown in FIG. 1 (b). Is in a closed state.

However, when the great bar 21 has fallen off, the contact wheel 4 falls into the dropout portion of the great bar 21, and there is no force to drag the contact wheel 4 in the traveling direction of the pallet 23. Due to the elastic force, the pallet 23 rotates in a direction opposite to the traveling direction, and is inclined in a direction opposite to the traveling direction of the pallet 23 than vertically upward. And at this time striker 1
The end 1a opposite to the end provided with the contact wheel 4 hits the limit switch 5, and the limit switch 5 transmits a great bar drop signal.

In the dropout detecting apparatus according to this embodiment, the great bar dropout signal from the limit switch 5 is sent to the dropout section arrival time required calculator 7, and the greatbar dropout is received based on the separately inputted pallet speed signal. Calculates the time required to reach the predetermined Great Bar replenishment location. The calculation result is sent to the pallet traveling controller 8, and a stop command is issued to the pallet traveling device 9 based on the calculation result.

[0022]

According to the present invention, the sintering yield is improved and troubles such as line stop are reduced.

[Brief description of drawings]

1A and 1B are explanatory views of a great bar dropout detector and apparatus according to an embodiment of the present invention, FIG. 1A is a front view showing the installation state of the dropout detector, and FIG. 1B is a dropout detection using the dropout detector. It is explanatory drawing which shows the structure of an apparatus.

FIG. 2 is an explanatory diagram showing a pallet great bar,
(A) is a front view, (b) is an AA sectional view of (a).

FIG. 3 is an explanatory diagram showing a state of a pallet when a great bar has fallen off.

[Explanation of symbols]

 1 Striker 2 Support stand 3 Rotating support shaft 4 Contact ring 5 Limit switch 6 Spring 7 Falling part arrival time calculator 8 Pallet traveling controller 9 Pallet traveling device

Claims (2)

[Claims] 1. When the pallet is in contact with the great bar, the pallet is in the first position, and when the great bar is missing, it is in the second position.
The striker that takes the position of and the detector that detects whether the striker is in the first position or the second position are combined to form a set, and the set is installed in the width direction of multiple pallets. Characteristic sintering bar dropout detector. 2. The great bar dropout detector according to claim 1, and a great bar dropout part that replenishes a predetermined greatbar dropout portion based on a traveling speed of a pallet in response to a great bar dropout signal from the great bar dropout detector. When the great bar dropout part reaches a predetermined greatbar replenishment place based on the calculation result of the great bar dropout part arrival time calculation means for calculating the time to reach the place and the greatbar dropout part arrival time calculation means A great bar drop-off detection device for a sintering machine, comprising: a pallet traveling control means for stopping traveling of the pallet.